User guide

SerVision MVG 400 System Guide
Configuring the MVG 400 65
Modem
Modem settings configure the system to use a cellular modem, if one is connected to the unit
(see Connecting the MVG 400 to an External Network, page 26). When the modem is
correctly configured, the MVG 400 automatically establishes a connection to a cellular
network through it. Before you configure the modem, ask your cellular supplier for the correct
settings.
NOTE: In general, if you use a cellular modem to make the MVG 400 accessible remotely,
you will have to use a SerVision proxy server to facilitate client connections to the
unit. For additional information, see Proxy and DDNS Settings, page 76.
When the unit is connected to a cellular network, the Modem status displayed in the System
Summary
screen in the network settings, is “Connected,” and the IP address of the MVG 400
on the cellular network is displayed there.
Figure 51: System Summary screen showing the MVG 400 connected to a cellular
network
The system can be configured to automatically test the modem connection periodically once it
is established. To do this, the unit uses a network feature called LCP to send a test “ping” to
the network. If the connection is functioning properly, the network replies with a
corresponding “ping” of its own. If the gateway receives no response from the network, it
assumes the connection is no longer functional, and attempts to reconnect. In most cases, it is
recommended that this feature be enabled. This feature is not available on all cellular
networks and, as such, it is recommended that you contact your cellular provider for more
information as to whether it should be used.
The unit does not have to be restarted before the cellular connection is established. This
makes it possible to quickly test the settings. Nevertheless, it is important to save the settings
IP in the cellular networ
k
Cellular status